Controller circuit board feeding device

Abstract

The invention relates to the technical field of circuit board conveying devices, and particularly discloses a controller circuit board feeding device which comprises a reflow soldering furnace, two conveying assemblies and a limiting mechanism, each conveying assembly comprises two first conveying belts rotating reversely, and the two conveying assemblies are installed in the reflow soldering furnace and at the front end of the reflow soldering furnace correspondingly; the limiting mechanism comprises a plurality of limiting plates, the multiple limiting plates are evenly installed on the peripheral side of the first conveying belt in an oval ring shape, each limiting plate comprises a clamping part and a supporting part, the clamping parts are prepared and formed by elastic materials, and in the initial state, the supporting parts are arranged on the supporting parts. The clamping part inclines in the direction away from the first conveying belt from top to bottom. The supporting part is horizontally connected to the lower end of the clamping part. Through cooperation of the first conveying belt and the limiting plate, clamping and automatic conveying of the circuit board are achieved, the stability of the circuit board is ensured, displacement of elements is avoided, and the welding quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board conveying devices, and in particular to a controller circuit board feeding device. Background Art

[0002] In the circuit board production process, the loading device is a key piece of equipment that transports circuit boards from one workstation to another. The reflow oven works by applying solder paste to the circuit board surface, placing electronic components on the paste, and then heating it at high temperatures to melt the solder, completing the soldering process between the circuit board with the mounted electronic components and the pins of the electronic components. Therefore, before feeding the circuit board into the reflow oven, the loading device needs to ensure that the circuit board can enter the reflow oven smoothly and accurately after the solder paste is applied and the components are placed.

[0003] Patent document CN216638112U discloses a reflow soldering loading mechanism, comprising a storage frame, a movable component disposed within the storage frame, a placement plate disposed within the storage frame, the movable component for causing the placement plate to slide within the storage frame, a fixed plate disposed within the storage frame, a suction component disposed on the surface of the fixed plate, and a first electric telescopic rod disposed on the surface of the storage frame, the first electric telescopic rod extending through the storage frame and fixedly connected to the fixed plate at one end. When the suction cup absorbs the workpiece, an air pump extracts excess air from the suction cup, ensuring the suction cup's stability and improving the suction cup's working efficiency. The first electric telescopic rod propels the fixed plate to move, and the fixed plate moves to the reflow soldering conveyor belt, improving the working efficiency of the loading mechanism, reducing manual loading costs, and ensuring the accuracy of workpiece placement.

[0004] Before a circuit board enters the reflow oven, it's typically coated with solder paste and loaded with electronic components. Using a suction cup to hold the circuit board in place can hinder its ability to adhere directly to the surface, compromising its effectiveness. Furthermore, because the contact area between the pins of electronic components and the solder paste is small, manual handling or suction cup placement can easily cause the components to shift due to the circuit board's shaking, impacting subsequent soldering quality and, consequently, compromising the circuit board's performance and proper operation. Summary of the Invention

[0005] The present invention provides a controller circuit board loading device, which aims to solve the problem existing in the loading device in the related art that the suction cup cannot effectively adsorb the circuit board because the surface of the circuit board is usually coated with solder paste and electronic components are placed before entering the reflow soldering furnace, and since the contact area between the pins of the electronic components and the solder paste is small, the electronic components are easily shifted due to the shaking of the circuit board, thereby affecting the welding quality.

[0006] A controller circuit board loading device of the present invention includes a reflow oven, a conveying assembly and a limiting mechanism; The conveyor assembly is provided in two groups, each group of conveyor assemblies includes two conveyor belts rotating in opposite directions, and there is a space between the two conveyor belts for the circuit board to pass through. The two groups of conveyor assemblies are respectively installed inside and at the front end of the reflow oven, and the end of the front conveyor belt is connected to the beginning of the rear conveyor belt. The limiting mechanism includes a plurality of limiting plates, which are uniformly installed on the outer peripheral side of the conveyor belt 1 in the shape of an elliptical ring. The limiting plate includes a clamping part and a supporting part. The clamping part is made of elastic material. In the initial state, the clamping part is inclined from top to bottom in the direction away from the conveyor belt 1, and the supporting part is horizontally connected to the lower end of the clamping part. When the limiting plate is located in the straight section of the conveyor belt 1, the two adjacent limiting plates remain parallel. When the limiting plate is located in the curved section of the conveyor belt 1, the projections of the two adjacent limiting plates in the upper and lower directions have an angle. In the process of the limiting plate rotating from the front curved section to the straight section, the distance between the two limiting plates on the conveyor belt 1 gradually decreases from front to back, and the circuit board transported from the front side is guided by the clamping part.

[0007] During operation, the circuit board is placed on the front conveyor belt 1, and the circuit board is supported and clamped by the limit plate on the front conveyor belt 1 to ensure the stability of the circuit board. At this time, the circuit board can be pre-processed by applying solder paste and placing components through manual or mechanical assistance. After the processing is completed, the front conveyor belt starts to operate and conveys the processed circuit board backward. When the circuit board moves to the front end of the rear conveyor belt 1, it can be guided by the limit plate located at the connection between the curved section and the straight section of the conveyor belt 1, and then the circuit board is clamped by the limit plate located on the straight section of the conveyor belt to achieve smooth transfer of the circuit board between the two conveyor belts, ensuring that the circuit board can be automatically transported after placing the components, and ensuring the stability of the circuit board during transportation to avoid displacement of electronic components due to shaking of the circuit board, and then the circuit board is driven by the rear conveyor belt 1 to move in the reflow oven to achieve welding of the circuit board.

[0008] Preferably, the limiting plate also includes a mounting portion, which is vertically connected to the upper end of the clamping portion. A mounting rod is provided on the side of the mounting portion close to conveyor belt one, and the mounting portion is connected to the outer peripheral side of conveyor belt one through the mounting rod. When the distance between the two relatively arranged mounting portions is less than the width of the circuit board, the clamping portion for clamping the circuit board will tilt from top to bottom toward the direction close to conveyor belt one.

[0009] The effect is that by adjusting the distance between the two conveyor belts in the same group, the degree of deformation of the clamping part when clamping the circuit board can be changed, so that the limit plate can clamp the circuit board to different degrees, ensuring clamping stability.

[0010] Preferably, a loading mechanism is also provided at the front end of the reflow oven, which includes a frame, two fixed plates and a feeding assembly. The two fixed plates are horizontally slidably mounted on the frame, and the frame is provided with a driving member for driving the two fixed plates away from or towards each other, so as to form a stacking cavity between the two fixed plates for stacking circuit boards layer by layer, and the feeding assembly is used to transport the circuit board located at the lower end of the stacking cavity to a conveyor belt on the front side.

[0011] Preferably, the feeding assembly includes a pallet, a clamping plate and a conveyor belt 2. There are two pallet and two clamping plates, which are respectively installed on opposite sides of the two fixed plates. When the two fixed plates are close to each other and form a stacking cavity, the circuit board placed in the stacking cavity will fall on the pallet. Each fixed plate is provided with a driving member 2 for driving the corresponding clamping plate to slide in the left and right directions. When the two clamping plates are close to each other, they can clamp the remaining circuit boards in the stacking cavity except the bottom layer. The conveyor belt 2 is arranged below the pallet, and the end of the conveyor belt 2 is connected to the head end of the conveyor belt 1 located on the front side.

[0012] The effect is that the two clamping plates can approach each other to clamp the remaining circuit boards in the stacking cavity except the bottom layer, and the two support plates can move away from each other to release the support plates' support for the circuit boards. At this time, the bottom layer of circuit boards will fall onto the second conveyor belt, realizing automatic loading of circuit boards, reducing manual intervention and improving production efficiency.

[0013] Preferably, a mounting groove is provided on the fixing plate, the supporting plate is longitudinally slidably installed in the mounting groove, and a locking member for locking the supporting plate at a set height is provided on the fixing plate.

[0014] Preferably, flexible contact portions are provided on opposite sides of the two clamping plates.

[0015] The effect is that the circuit board can be stably clamped by the flexible contact portion, thereby ensuring the clamping effect and preventing the side of the circuit board from being damaged.

[0016] Preferably, each contact portion is inclined from top to bottom toward the other clamping plate.

[0017] The effect is that, through the inclined design of the contact part, the clamping force exerted on the stacked circuit boards can be gradually increased from top to bottom, preventing the circuit boards on the lower layer from falling due to the gravity of the upper layer circuit boards, thereby ensuring the clamping effect of the clamping plate on the circuit boards.

[0018] Preferably, a limiting structure for limiting the position of the circuit board is provided on the frame, and the limiting structure includes a plurality of limiting rods provided on the peripheral side of the stacking cavity, and each limiting rod is provided longitudinally.

[0019] Preferably, the limiting rod located at the front side of the stacking cavity is connected to the fixed plate, and the limiting rod located at the rear side of the stacking cavity is slidably matched with the fixed plate along the front-to-back direction.

[0020] Preferably, a push plate is provided on the second conveyor belt for pushing the circuit board to move.

[0021] The beneficial effects of the present invention are: 1. The present invention is provided with a conveying assembly and a limiting mechanism. When a circuit board is placed on the conveyor belt 1 on the front side, the circuit board can be supported and clamped by the limiting plate on the conveyor belt 1 to ensure the stability of the circuit board. At this time, the circuit board can be pre-processed by applying solder paste and placing components in a manual and mechanically assisted manner. After the pre-processing is completed, the circuit board is conveyed to the conveyor belt 1 on the rear side through the operation of the conveyor belt 1, so that the circuit board is smoothly sent into the reflow soldering furnace, realizing automatic conveyance of the circuit board, ensuring the stability of the circuit board, avoiding the displacement of electronic components due to reasons such as manual handling of the circuit board, and thus ensuring the welding quality.

[0022] 2. The present invention is provided with a loading mechanism. When loading is required, the two clamping plates are first brought closer to each other to clamp the remaining circuit boards in the stacking cavity except the bottom layer. Then, the two supporting plates are moved away from each other to release the support for the circuit boards. At this time, the bottom layer of the circuit boards will fall onto conveyor belt 2 and be transported to conveyor belt 1 through conveyor belt 2 for pretreatment and welding, thereby realizing automatic loading of circuit boards, reducing manual intervention and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a left side view of the present invention.

[0025] Figure 3 It is a schematic structural diagram of the conveying assembly of the present invention.

[0026] Figure 4 It is a schematic diagram of the assembly structure of the conveyor belt and the limiting plate of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the limiting plate of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the feeding mechanism of the present invention.

[0029] Figure 7 It is a schematic diagram of the assembly structure of the supporting plate, the clamping plate and the fixing plate of the present invention.

[0030] Figure 8 It is a partial structural schematic diagram of the feeding mechanism of the present invention.

[0031] Reference numerals: 1. Reflow oven; 11. Conveyor belt 1; 2. Limiting plate; 21. Mounting portion; 22. Clamping portion; 23. Support portion; 24. Mounting rod; 3. Frame; 31. Fixing plate; 311. Mounting slot; 32. Support plate; 33. Clamping plate; 34. Conveyor belt 2; 341. Push plate; 35. Limiting rod; 4. Circuit board. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] like Figures 1 to 8 As shown, a controller circuit board loading device of the present invention includes a reflow oven 1, a conveying component and a limiting mechanism.

[0034] The reflow oven 1 is used to realize the welding between the circuit board 4 and the electronic components. The conveying assembly is used to smoothly convey the circuit board 4 to be welded to the welding area to ensure the smooth progress of the entire welding process. The limiting mechanism is used to accurately position and fix the circuit board 4 to prevent the welding quality from being affected by the shaking of the circuit board 4 and ensure the stability of the circuit board 4.

[0035] When performing the reflow soldering process of the circuit board 4, first apply a layer of solder paste to the specific area on the surface of the circuit board 4 where the electronic components need to be soldered, then accurately place the required electronic components on the corresponding positions coated with the solder paste, and then convey the circuit board 4 to the reflow soldering furnace 1 through the conveying assembly. In the reflow soldering furnace 1, by precisely controlling the temperature curve, the circuit board 4 is heated from room temperature to above the melting point of the solder, and then quickly cooled, thereby completing the entire soldering process and ensuring a stable electrical connection between the electronic components and the circuit board 4.

[0036] The reflow oven 1, with the side facing the conveying direction of the circuit board 4 as the rear side, has a feed inlet and a discharge outlet at its front and rear ends, respectively. From front to back, the interior of the oven 1 is divided into a preheating zone, a holding zone, a reflow zone, and a cooling zone. After entering the oven 1, the circuit board 4 passes through these four zones in sequence under the action of the conveyor assembly. By adjusting the length of each zone, the dwell time of the circuit board 4 in each zone can be precisely controlled, while the circuit board 4 moves at a constant speed, thereby achieving precise control of the soldering process. In the preheating zone, the circuit board 4 is gradually heated from room temperature to remove solvents and volatile substances from the solder paste and avoid thermal shock. In the holding zone, the temperature remains relatively stable, fully activating the flux in the solder paste and ensuring a uniform temperature on the circuit board 4. In the reflow zone, the temperature rises rapidly to above the melting point of the solder, causing the solder to melt and wet the solder pads and electronic component pins, forming a good solder joint. In the cooling zone, the temperature of the circuit board 4 is rapidly reduced, causing the solder to solidify and form a stable solder joint.

[0037] like Figures 1 to 3 As shown, the conveyor assembly is provided in two groups, each group of which includes two counter-rotating conveyor belts 11, with an appropriate space left between the two conveyor belts 11 to facilitate the smooth passage of the circuit board 4. One group of conveyor assemblies is installed inside the reflow oven 1, and the other group of conveyor assemblies is installed at the front of the reflow oven 1. The end of the conveyor belt 11 located at the front is connected to the beginning of the conveyor belt 11 located inside the reflow oven 1, thereby enabling the transfer of the circuit board 4 between the two groups of conveyor belts 11. Slide rails for the conveyor belts 11 to slide are provided inside the reflow oven 1, and a frame for installing the other group of conveyor assemblies is provided at the front of the reflow oven 1. The frame is also provided with slide rails for the conveyor belts 11 to slide. By sliding the conveyor belts 11, the distance between the two conveyor belts 11 in the same group can be adjusted to meet different operating requirements.

[0038] Conveyor Belt 11 on the front side uses an intermittent conveying mode, meaning it alternates between moving and stopping during operation. During these stops, personnel can place circuit boards 4 onto Conveyor Belt 11 manually or with mechanical assistance. Pre-processing steps such as applying solder paste and placing components can then be performed manually or mechanically. As Conveyor Belt 11 moves, pre-processed circuit boards 4 are conveyed back to Conveyor Belt 11 on the rear side for reflow soldering within the reflow oven 1. Conveyor Belt 11 on the rear side uses a constant speed conveying mode to ensure a consistent movement of the circuit boards 4 within the oven 1.

[0039] like Figures 1 to 5As shown, the limiting mechanism includes multiple limiting plates 2, each of which is uniformly mounted in an elliptical ring shape on the outer periphery of conveyor belt 11. Each limiting plate 2 includes a mounting portion 21, a clamping portion 22, and a support portion 23. The mounting portion 21 is longitudinally arranged, and a mounting rod 24 is provided on one side of the mounting portion 21. The mounting portion 21 is connected to the outer periphery of conveyor belt 11 via the mounting rod 24. The clamping portion 22 is connected to the lower end of the mounting portion 21 and is formed from an elastic material. In its initial state, the clamping portion 22 is tilted from top to bottom, away from conveyor belt 11. When a circuit board 4 enters between two conveyor belts 11, the clamping portions 22 located on the left and right sides of the circuit board 4 effectively clamp the circuit board 4. The support portion 23 is horizontally connected to the lower end of the clamping portion 22 to support the circuit board 4 entering between the two conveyor belts 11. When the limiting plates 2 are located on a straight section of conveyor belt 11, adjacent limiting plates 2 remain parallel to each other, ensuring smooth passage of the circuit board 4. When the limit plate 2 is located at the curved section of the conveyor belt 11, the projections of the two adjacent limit plates 2 in the up and down directions will form a certain angle. Therefore, in the process of the limit plate 2 rotating from the front curved section to the straight section, the distance between the limit plates 2 arranged on the two conveyor belts 11 will gradually decrease from front to back. At this time, the circuit board 4 transported from the front side can be guided by the clamping part 22, so as to guide the circuit board 4 to the axial position of the conveying component, thereby ensuring that the circuit board 4 can be accurately transported to the reflow oven 1.

[0040] Specifically, before conveying the circuit board 4, it is necessary to adjust the distance between the two conveyor belts 11 according to the specifications and dimensions of the circuit board 4, and then change the distance between the two relatively arranged mounting portions 21 to match the dimensions of the circuit board 4, thereby providing a smooth and stable conveying environment for the circuit board 4, ensuring the clamping effect of the limit plate 2 on the circuit board 4, and preventing the circuit board 4 from getting stuck during the conveying process. During the process of conveying the circuit board 4 from front to back, when the rear end of the circuit board 4 moves to the front end of the conveyor belt 11, the limit plate 2 located at the junction of the curved section and the straight section of the conveyor belt 11 can play its guiding role and guide the circuit board 4 to the axial position of the conveying assembly. Because the clamping portion 22 in the limit plate 2 is in an inclined state in the initial state, as the circuit board 4 continues to be conveyed backward, the rear end of the circuit board 4 will be blocked by the limit plate 2 in the straight section. Then, as the limit plate 2 in the curved section gradually rotates to the straight section, the support portion 23 in this part of the limit plate 2 will gradually move to the bottom of the circuit board 4 to support the circuit board 4. At the same time, the clamping portion 22 will gradually move to the left and right sides of the circuit board 4 to clamp the circuit board 4, ensuring the stability of the circuit board 4 during the transportation process.

[0041] In addition, in the initial state, after adjusting the distance between the two conveyor belts 11 in the same group according to the size of the circuit board 4, if the distance between the two oppositely arranged mounting portions 21 is greater than the width of the circuit board 4, and the distance between the lower ends of the two oppositely arranged clamping portions 22 is less than the width of the circuit board 4, as the limit plate 2 gradually rotates from the curved section to the straight section and fits with the side of the circuit board 4, the clamping portion 22 will be squeezed by the circuit board 4 and deformed toward the side close to the conveyor belt 11. Through the deformation of the clamping portion 22, a stable clamping force can be applied to the circuit board 4, thereby ensuring the stability of the circuit board 4 during the transportation process. If the distance between the two oppositely arranged mounting portions 21 is slightly smaller than the width of the circuit board 4, then in the process of the limiting plate 2 gradually rotating from the curved section to the straight section and fitting with the side of the circuit board 4, the clamping portion 22 will also be squeezed by the circuit board 4 and deformed toward the side close to the conveyor belt 11, and when the clamping is completed, the clamping portion 22 will tilt from top to bottom toward the direction close to the conveyor belt 11. Through the reverse inclination of the clamping portion 22, not only can a central clamping force be provided to the circuit board 4, but also a downward clamping force can be provided to the circuit board 4, thereby further improving the stability of the circuit board 4.

[0042] like Figures 1 to 8 As shown, the front end of the reflow oven 1 is also provided with a loading mechanism, which includes a frame 3, two fixed plates 31, and a feeding assembly. The frame 3 is located at the head end of the front conveyor belt 11. The two fixed plates 31 are arranged opposite each other, and a stacking cavity for stacking circuit boards 4 layer by layer is formed between them. Each fixed plate 31 is mounted on the frame 3 for horizontal sliding in the left-right direction, and the frame 3 is provided with a driving member 1 for driving the two fixed plates 31 away from or towards each other. The driving member 1 can be configured as a cylinder, an electric push rod, etc., for independently driving each fixed plate 31 to move. Through the precise control of the driving member 1, the distance between the two fixed plates 31 can be flexibly adjusted to accommodate the stacking operation of circuit boards 4 of different sizes.

[0043] like Figures 6 to 8As shown, the feeding assembly includes a support plate 32, a clamping plate 33, and a second conveyor belt 34. Two support plates 32 are provided, one mounted on each side of the two fixed plates 31. When the two fixed plates 31 approach each other and form a stacking cavity, the circuit board 4 placed in the stacking cavity will fall onto the support plate 32, supporting the circuit board 4. Two clamping plates 33 are provided, one mounted on each side of the two fixed plates 31. Each fixed plate 31 is provided with a second drive element for driving the corresponding clamping plate 33 to slide in the left-right direction. The second drive element can be configured as a cylinder, an electric push rod, or the like. When the two clamping plates 33 approach each other, they can clamp the circuit board 4 in the stacking cavity. The two clamping plates 33 are each provided with a contact portion on the opposite side. The contact portion is formed from a flexible material, which can ensure stable clamping of the circuit board 4 while avoiding damage to the side edges of the circuit board 4. Each contact portion is inclined from top to bottom toward another clamping plate 33, so that the clamping force exerted on the multiple circuit boards 4 stacked layer by layer gradually increases from top to bottom, effectively preventing the circuit boards 4 on the lower layer from falling due to the gravity of the upper circuit boards 4, and ensuring the clamping effect of the clamping plates 33 on the circuit boards 4.

[0044] The two fixed plates 31 are each provided with a mounting slot 311 on one side relative to the other. The support plate 32 is longitudinally slidably mounted within the mounting slot 311 on the corresponding side. The fixed plates 31 are provided with locking members for locking the support plate 32 at a set height. The locking members can be configured as bolts and nuts, etc. Before placing the circuit board 4 in the stacking chamber, the height of the support plate 32 needs to be adjusted according to the size of the circuit board 4, so that the distance between the upper end of the support plate 32 and the lower end of the clamping plate 33 is greater than the thickness of one circuit board 4 and less than the thickness of two circuit boards 4. In this case, when the two clamping plates 33 are brought closer together, they can clamp the remaining circuit boards 4 in the stacking chamber except for the bottom layer. Conveyor belt 2 34 is provided below the support plate 32, and the end of conveyor belt 2 34 is connected to the head end of conveyor belt 1 11 located on the front side. Conveyor belt 2 34 is provided with a push plate 341 for pushing the circuit board 4 to move.

[0045] When loading is required, the clamping plate 33 is first driven by the second driver to clamp the remaining circuit boards 4 in the stacking chamber except for the bottom layer. Then, the two fixed plates 31 are driven away from each other by the first driver. As the fixed plates 31 move, the support plate 32 is driven to move synchronously. When the support plate 32 is completely detached from the bottom of the circuit board 4, the circuit boards 4 in the stacking chamber lose the support of the support plate 32. At this time, the bottom layer of circuit boards 4 will fall onto the second conveyor belt 34. Then, the second conveyor belt 34 starts to operate and the push plate 341 is used to smoothly convey the circuit boards 4 to the front conveyor belt 11. During the process of transferring the circuit boards 4 from the second conveyor belt 34 to the front conveyor belt 11, the limit plate 2 on the front conveyor belt 11 can guide and clamp the circuit boards 4, ensuring that the circuit boards 4 can remain stable during the process of applying solder paste and placing components. When the bottom layer of circuit board 4 is completed, the two fixing plates 31 are driven to approach each other by driving member 1, and at the same time, the supporting plate 32 is driven to extend to the bottom of the circuit board 4 again, and then the clamping plate 33 is driven by driving member 2 to move in the opposite direction to release the clamping of the circuit board 4. At this time, the circuit board 4 will fall on the supporting plate 32 under the action of gravity, realizing automatic filling of the circuit board 4.

[0046] like Figures 6 to 8 As shown, the frame 3 is provided with a limiting structure for limiting the position of the circuit board 4. The limiting structure includes multiple limiting rods 35 arranged around the stacking chamber, and each limiting rod 35 is arranged longitudinally. The limiting rods 35 located on the left and right sides of the stacking chamber are respectively installed on the fixed plate 31 on the corresponding side. The limiting rod 35 located on the front side of the stacking chamber is connected to the fixed plate 31, and the limiting rod 35 located on the rear side of the stacking chamber slides with the fixed plate 31 in the front-to-back direction. Among them, a slider is connected to the rear limiting rod 35, and a sliding groove adapted for the slider is provided on the fixed plate 31. The slider can slide back and forth in the sliding groove to adjust the distance between the rear limiting rod 35 and the front limiting rod 35, thereby being able to accommodate circuit boards 4 of different sizes. When circuit boards 4 of different specifications need to be placed, the staff only needs to slide the limiting rod 35 on the rear side to move it to the appropriate position, and then fix the slider to the fixing plate 31 by bolts, etc., to ensure that the limiting rod 35 will not move at will during the operation, thereby ensuring the limiting effect of the circuit board 4, so that the circuit board 4 can be stably placed in the stacking cavity, and the loading operation will not be affected by shaking or position displacement.

[0047] The working process of the loading device of the present invention is as follows: First, according to the size of the circuit board 4, the two groups of conveying components are adjusted so that the distance between the two conveyor belts 11 in the same group is adapted to the width of the circuit board 4. Then, the distance between the two fixed plates 31 is adjusted by a driving member, and the position of the rear limit rod 35 is manually adjusted so that the size of the stacking cavity formed is slightly larger than the size of the circuit board 4, providing sufficient space for the circuit boards 4 to be stacked. Then, the height of the two support plates 32 is manually adjusted to ensure that the distance between the upper end of the support plate 32 and the lower end of the clamping plate 33 is greater than the thickness of one circuit board 4 and less than the thickness of two circuit boards 4. Finally, the circuit boards 4 that need to be reflowed are placed in the stacking cavity in an orderly manner in a layer-by-layer stacking manner, preparing for subsequent loading work.

[0048] During the loading operation, the two clamping plates 33 are first driven toward each other by the second drive member, clamping all but the bottom layer of circuit boards 4 in the stacking chamber. The second drive member then drives the two fixing plates 31 away from each other, simultaneously moving the support plate 32 accordingly. Once the support plate 32 is completely released from beneath the circuit boards 4, the bottom layer of circuit boards 4 lose their support and fall onto the second conveyor belt 34 under gravity. The second conveyor belt 34 then begins to operate, and the push plate 341 steadily transports the circuit boards 4 to the front conveyor belt 11. During the transfer of the circuit boards 4 from the second conveyor belt 34 to the front conveyor belt 11, the limit plates 2 on the front conveyor belt 11 guide and clamp the circuit boards 4, ensuring their stability during transfer. When the circuit boards 4 are fully moved onto the front conveyor belt 11, the front conveyor belt 11 stops, and the limit plates 2 continue to support and clamp the circuit boards 4, ensuring their stability. At this point, pre-processing steps such as applying solder paste and placing components can be performed on the circuit board 4 manually or mechanically. After processing is complete, the front conveyor belt 11 resumes operation, smoothly conveying the circuit board 4 to the rear conveyor belt 11. During this process, the limit plates 2 on the rear conveyor belt 11 guide the circuit board 4 and maintain its clamping state, ensuring smooth transfer of the circuit board 4 between the two conveyor assemblies and ensuring the stability of the circuit board 4. As the rear conveyor belt 11 continues to convey the circuit board 4, it passes through zones of varying lengths within the reflow oven 1 at a uniform speed, including the preheating zone, holding zone, reflow zone, and cooling zone, completing the soldering process.

[0049] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A controller circuit board feeding device, comprising a reflow oven (1), characterized in that: It also includes a conveying component and a limiting mechanism; The conveying components are provided in two groups, each group of conveying components includes two conveying belts (11) rotating in opposite directions, and there is a space between the two conveying belts (11) for the circuit board (4) to pass through, and the two groups of conveying components are respectively installed inside and at the front end of the reflow oven (1), and the end of the front conveying belt (11) is connected to the beginning of the rear conveying belt (11); The limiting mechanism includes a plurality of limiting plates (2), which are uniformly installed on the outer peripheral side of the conveyor belt (11) in an elliptical ring shape. The limiting plate (2) includes a clamping portion (22) and a supporting portion (23). The clamping portion (22) is formed by an elastic material. In the initial state, the clamping portion (22) is inclined from top to bottom in a direction away from the conveyor belt (11). The supporting portion (23) is horizontally connected to the lower end of the clamping portion (22). When the limiting plate (2) is located on the conveyor belt (11), the supporting portion (23) is horizontally connected to the lower end of the clamping portion (22). When the limiting plates (2) are located on the straight section of the conveyor belt (11), the two adjacent limiting plates (2) remain parallel. When the limiting plates (2) are located on the curved section of the conveyor belt (11), the projections of the two adjacent limiting plates (2) in the vertical direction have an angle. In the process of the limiting plates (2) rotating from the front curved section to the straight section, the distance between the limiting plates (2) provided on the two conveyor belts (11) gradually decreases from front to back, and the circuit board (4) conveyed from the front is guided by the clamping portion (22).

2. A controller circuit board feeding device according to claim 1, characterized in that: The limiting plate (2) further includes a mounting portion (21), the mounting portion (21) being vertically connected to the upper end of the clamping portion (22), a mounting rod (24) being provided on a side of the mounting portion (21) close to the conveyor belt (11), the mounting portion (21) being connected to the outer peripheral side of the conveyor belt (11) via the mounting rod (24), and when the distance between the two relatively arranged mounting portions (21) is smaller than the width of the circuit board (4), the clamping portion (22) for clamping the circuit board (4) will tilt from top to bottom toward the direction close to the conveyor belt (11).

3. A controller circuit board feeding device according to claim 1, characterized in that: The front end of the reflow oven (1) is also provided with a loading mechanism, which includes a frame (3), two fixed plates (31) and a feeding assembly. The two fixed plates (31) are horizontally slidably mounted on the frame (3), and a driving member is provided on the frame (3) for driving the two fixed plates (31) to move away from or toward each other, so as to form a stacking cavity for stacking circuit boards (4) layer by layer between the two fixed plates (31). The feeding assembly is used to convey the circuit board (4) located at the lower end of the stacking cavity to a conveyor belt (11) on the front side.

4. A controller circuit board feeding device according to claim 3, characterized in that: The feeding assembly includes a support plate (32), a clamping plate (33) and a second conveyor belt (34). Two support plates (32) and two clamping plates (33) are provided and are respectively installed on opposite sides of two fixed plates (31). When the two fixed plates (31) are close to each other and form a stacking cavity, the circuit board (4) placed in the stacking cavity will fall on the support plate (32). Each fixed plate (31) is provided with a second driving member for driving the corresponding clamping plate (33) to slide in the left and right directions. When the two clamping plates (33) are close to each other, the remaining circuit boards (4) in the stacking cavity except the bottom layer can be clamped. The second conveyor belt (34) is provided below the support plate (32), and the end of the second conveyor belt (34) is connected to the head end of the first conveyor belt (11) located on the front side.

5. A controller circuit board feeding device according to claim 4, characterized in that: The fixing plate (31) is provided with a mounting groove (311), the supporting plate (32) is longitudinally slidably mounted in the mounting groove (311), and the fixing plate (31) is provided with a locking member for locking the supporting plate (32) at a set height.

6. A controller circuit board feeding device according to claim 5, characterized in that: The two clamping plates (33) are each provided with a flexible contact portion on one opposite side.

7. A controller circuit board feeding device according to claim 6, characterized in that: Each contact portion is inclined from top to bottom in a direction close to another clamping plate (33).

8. The controller circuit board feeding device according to claim 3, characterized in that: A limiting structure for limiting the position of the circuit board (4) is provided on the frame (3), and the limiting structure comprises a plurality of limiting rods (35) arranged on the periphery of the stacking cavity, and each limiting rod (35) is arranged longitudinally.

9. A controller circuit board feeding device according to claim 8, characterized in that: The limiting rod (35) located at the front side of the stacking cavity is connected to the fixed plate (31), and the limiting rod (35) located at the rear side of the stacking cavity is slidably engaged with the fixed plate (31) along the front-back direction.

10. The controller circuit board feeding device according to claim 4, characterized in that: The second conveyor belt (34) is provided with a push plate (341) for pushing the circuit board (4) to move.

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